Not really. We did a comparison of a our 80 RMB HEPA and a 30 RMB HEPA purchased on Taobao. The test shows the Smart Air DIY HEPA got over 99.9% of particles, but the 30 RMB HEPA was below 90%–far below their claim of 99.97%. The cheaper one also gets less air through during the same period of time.
Click here to read more on our original tests and data: https://smartairfilters.com/en/blog/is-a-30rmb-hepa-reliable/